Reclosable container



Sept. 15, 1.964 D. E. DIEZ RECLOSABLE CONTAINER Filed Jan. 11

FIG. 2

INVENTOR.

DONALD E. DIEZ A TTORNE Y United States Patent 3,148,823 RECLOSABLECONTAINER Donald E. Diez, White Bear Lake, Minn, assignor to UnionCarbide Corporation, a corporation of New York Filed Jan. 11, 1963, Ser.No. 250,938 11 Claims. (Cl. 229-51) This invention relates to acontainer. More specifically, this invention relates to a reclosablecontainer which is particularly adaptable for packaging comestibles.

It is the principal object of the present invention to provide acontainer which can be initially closed, opened to provide access to thecontents therein without any undesirable damage to the container andreclosed to provide protected storage for the partially depletedcontents.

Further objects and advantages of the present invention will be obviousfrom the description which follows, taken in conjunction with theaccompanying drawings wherein:

FIGURE 1 is a perspective view of a container of the present invention,shown open;

FIGURE 2 is a perspective View of the container of FIGURE 1, shownpartially closed;

FIGURE 3 is a perspective view of the container of FIGURE 1, shown fullyclosed;

FIGURE 4 is a perspective view of a modified container of the presentinvention, shown open; and

FIGURE 5 is a perspective view of another modified container of thepresent invention, shown open.

Briefly, the containers of the present invention comprise (1) anintegral open receptacle and (2) a sectionalized overwrap portion,unitive with the open receptacle, which is adapted to be folded aboutthe open receptacle and held in place by locking tongue and slit.

Turning now to the accompanying drawings wherein like par-ts areidentified by the same reference numerals, and more specificallyreferring to FIGURES 1, 2 and 3, the container is shown to include anintegral open receptacle generally indicated by reference numeral and asectionalized overwrap portion generally indicated by reference numeral17.

Open receptacle 10 is shown to have a front wall 11, rear wall 12,bottom wall 13 and end walls 14 and 15. Unitive with upper edge 16 offront wall 11 is overwrap portion 17 which is provided with transversescore lines 33, 34, 35 and 36 dividing the overwrap portion into aseries of sections comprising a first side section 18, a bot tom section21, a second side section 24, top section 26 and transverse flap 29.Overwrap portion can be connected to or integral with open receptacle1ft. Overwrap portion 17 folds about open receptacle 19 in a clockwisedirection with first side section 18, bottom section 21 and second sidesection 24 adapted to be coextensively folded over front wall 11, bottomwall 13 and rear wall 12. This is clearly shown in FIGURE 2. Top section26 is adapted to be folded over and to form the top wall of receptacle10, as is shown in FIGURE 2.

First side section 18 and second side section 24 are generally providedwith contiguous hinged end flaps 2t) and 25 respectively, which areadapted to be folded along lines 37 and 39 and over end Walls 14 and ofreceptacle It), as is shown in FIGURE 2 where end flaps 20 and arefolded over end wall 14. First side section 18 is also provided with atransverse slit 19, the function of which will be subsequentlydescribed.

Bottom section 21 is also provided with contiguous hinged end flaps 22which generally have longitudinal slits 23 therein. Hinged end flaps 22are adapted to be folded along lines 38 and superimposed over end flaps20 and 25 of first side section 18 and second side section 24,respectively. This is clearly shown in FIGURE 2 where 3,148,823 PatentedSept. 15, 1964 end flap 22 is in a position to be superimposed over endflaps 29 and 25.

Top section 26 is provided with contiguous hinged end flaps 27, which inthe embodiment shown in FIGURES 1-3, have locking tongues 28 thereon.The shape of these tongues is not critical and, for example, can be adovetail shape, as indicated by the tongue in FIGURE 1 and indicated bythe reference numeral 28, or can be a tapered shape, as shown by thetongue in FIGURE 5 and indicated by the reference numeral 42. End flaps27 are adapted to be folded along l'mes 40 and superimposed over endflaps 22 of bottom section 21 and each tongue 28 inserted intocorresponding and complementary slits 23 of end flaps 22 to form a neatclosure.

Also, top section 26 is contiguous with hinged transverse flap 29 whichis adapted to be folded along score line 36 and superimposed over firstside section 18. Transverse flap 29 has a locking tongue 30 which can beof any desired configuration, as for example, a dovetail shape, as shownby the tongue in FIGURE 1 and indicated by the numeral 30, or it can bea tapered shape, as shown by the tongues in FIGURES 4 and 5 andindicated by reference numerals 41. Locking tongue 30 is inserted incomplementary transverse slit 19 in first side section 18 to provide aneat front closure.

It is to be understood that overwrap 17 can be secured in its foldedposition about receptacle 10 by the use of the aforementioned lockingtongues and slits and when desired and feasible, depending upon thenature of the material from which the container is formed, by localseals, e.g., heat or adhesive. This is more fully understood byreference to FIGURE 3 where the container of FIGURE 1 is shown fullyclosed. Here overwrap 17 is shown folded about open receptacle 10 and issecured by inserting locking tongues 28 and 30 in slits 23 and 19respectively. If desired, the overwrap can be additionally secured bylocally sealing the locking tongues in place, at points indicated by thereference numerals 44 and 45 in FIGURE 3.

The container shown in FIGURE 4 is one with which local seals can beadvantageously utilized. This container is the same as that shown inFIGURES 1-3 with the exception that end flaps 22 do not havelongitudinal slits and end flaps 27 are devoid of any locking tongues.With such an arrangement, end flaps 27 are locally sealed, byappropriate means, to end flaps 22.

As stated, local seals can also be utilized to further se cure thelocking tongues in place. Thus, a container of the present invention canbe closed and locally sealed in the area of the locking tongues andslits in such a manner that the seal is rupturable by slight force, thusallowing for free disengagement of the locking tongues from theircomplementary slits to provide initial access to the contents therein.The container can then be reclosed, through the locking tongues andcomplementary slits, to provide protected storage for the partiallydepleted contents of the container.

It is also possible to locally seal end flaps 20 and 25 to end walls 14and 15 of open receptacle 10 thereby holding partially folded overwrap17 in place, as shown in FIGURE 2, with the result that further foldingof the overwrap is facilitated and simplified.

Considering now the container shown in FIGURE 5, this container is thesame as is shown in FIGURE 1 with the exception that first side section18 has no end flaps and that transverse flap 29 has end flaps 31. Endflaps 31 are adapted to be folded along lines 46 and to be insertedbetween end walls 14 and 15 and end flaps 22.

Where the nature of the material being packaged, usually a comestible,so requires, a thin overlay, as partially shown in FIGURE 1 by referencenumeral 47, can be bonded to the upper edges of open receptacle 10 to 35provide a hermetic seal which further protects the contents of thecontainer. Upon initial opening of the container, this overlay ismanually stripped away to provide access to the contents. Overlay 47 canbe bonded to open receptacle 19 by any of several means known to the artby which a membrane is bonded to another material such as by heatbonding, adhesive bonding, and the like. The membrane used for overlay47 generally has a thickness of from about /2 mil to about 2 mils andpreferably from about 7 4 mil to about 1 /2 mils. Suitablethermoplastics to be used for the overlay have a tensile modulus(ASTMD38254TC) of about 25,960 p.s.i. to about 115,000 p.s.i.;illustrative of which are polyvinylidene chloride, polyvinyls,polyethylene, polypropylene, polystyrene, polyesters, regeneratedcellulose and the like, and copolymers such as a copolymer of vinylchloride and vinyl acetate and the like. When a polyvinylidene chlorideresin is used, both for the overlay and the container, overlay 47 isdirectly bonded to the upper edges of open receptacle 1th by theinherent adhesive properties of these resins without the need of heat oradhesive bonding. An overlay of this nature can also be initiallystripped away and rebonded to the open receptacle to provide continuedhermetic sealing. Other suitable mcmbranes are those made from metalfoil, such as aluminum foil; Glassine paper; paper and the like.

As indicated previously, containers and components thereof of thepresent invention are generally produced from a formable sheet material.As a rule these containers have a thickness of from about 4 mils toabout mils, and preferably from about 12 mils to about 18 mils. Suitablethermoplastic materials from which containers of the present inventioncan be formed have a tensile modulus equal to or greater than 100,000p.s.i.; illustrative of which are polyethylene, polypropylene,polyvinyls, polyesters, polyethers, polycarbonates, polyhydroxyethcrs,polystyrene, polyacrylics, cellulose acetate, and the like, andcopolymers such as a copoiymer of ethylene and propylene, and the like.The preferred thermoplastic is polyethylene due to its excellentresistance to gas permeation and chemical attack.

If desired, thermoplastic materials used to form containers of thepresent invention can contain various additives, for example fillers,pigments, plasticizers, stabilizers, preservatives, lubricants,anti-oxidants, and the like.

Generally the containers of the present invention are produced from asingle formable sheet by a series of simultaneous or sequential formingoperations which are described in detail below. However, it is to beunderstood that containers of the present invention can be assembledfrom a pro-formed open receptacle and a preformed overwrap by bondingthe overwrap to the upper front edge of the open receptacle. Containersof the present invention can comprise an open receptacle and an overwrapof the same or different material, and having the same or differentthicknesses.

It is to be pointed out that containers of the present invention can beformed from materials other than thermoplastics. Choice of materialswill depend upon several factors such as the nature of the comestiblebeing packaged and relative costs. For example, integral openreceptacles forming part of the containers of the present invention canbe formed from metal foils such as aluminum and the like, and frompressed paper pulp. Also, overwrap portions of containers of the presentinvention can be formed from laminates of paper and metal foils such asaluminum and the like, and from paper coated with a thermoplastic suchas polyethylene or a foamed thermoplastic such as foamed high-densitypolyethylene, polystyrene and the like.

Open receptacles of containers of the present invention can be formed byany method known in the art for forming an integral open receptacle.Illustrative of such methods are vacuum molding, compression molding,cold forming and the like.

Overwrap portions of containers of the present invention can similarlybe formed from a sheet material by any method known in the art such ascutting and scoring by hand, stamping with steel rule cutting andscoring dies, and the like. The overwrap portion can also be molded, asfor example by compression molding using matched metal dies. Theovcrwrap portion can also bear printed matter indicative of the contentsof the container applied by any means commonly known in the art.

The overwrap portion can be folded about an open receptacle to form aclosed container of the present invention by hand or by automaticmachinery known in the art, and locally sealed by conventional means,also known in the art.

Furthermore, containers of the present invention when in an openposition shown in FIGURE 1 are readily nestable one in the other toprovide maximum utilization of a minimum of storage space.

Containers of the present invention are useful for packaging variousarticles and are especially useful for packaging cornestibles, in bulkform, such as shredded coconut and the like.

What is claimed is:

l. A container, particularly adaptable for packaging comestibles,comprising an integral open receptacle having as integral parts a frontwall, a bottom wall, a rear wall and end walls, an overwrap portionadapted to be folded about said open receptacle, said overwrap portionbeing unitive with said open receptacle along the upper edge of saidfront wall and being provided with transverse score lines dividing saidoverwrap portion into a series of sections comprising a first sidesection, a bottom section, a second side section, a top section andtransverse fiap, said first side, bottom and second side sectionsadapted to be coext nsively folded over said front, bottom and rearwalls respectively of said open receptacle, said top section adapted tobe folded over and form the top wall of said open receptacle and meansto maintain said overwrap portion folded over said receptacle to form aclosed container.

2. A container, particularly adaptable for packaging comestioles,comprising an integral open receptacle and an overwrap portion adaptedto be folded about said open receptacle, said open receptacle having asintegral parts, a front wall, a bottom wall, a rear wall, and end walls,said overwrap portion being unitive with said open receptacle along theupper edge of said front wall, and being provided with transverse scorelines dividing said overwrap portion into a series of sectionscomprising a first side section, a bottom section, a second sidesection, a top section and transverse flap, said first side, bottom andsecond side sections adapted to be coextensively folded over said front,bottom and rear walls respectively of said open receptacle, said topsection adapted to be folded over and form the top wall of said openreceptacle, said first and second side sections being provided withcontiguous hinged end flaps adapted to be folded over said end walls ofsaid open receptacle, said first side section being provided with atransverse slit, said bottom section being provided with contiguoushinged end flaps having longitudinal slits therein adapted to besuperimposed over said end flaps of said first and second sections, saidtop section being provided with contiguous hinged end flaps adapted tobe superimposed over said end flaps of said bottom section, and havingthereon locking tongues in- V rear wall, and end walls, saidoverwrap'portion being integrally connected to said open receptaclealong the upper edge of said front wall, and being provided withsuitable transverse score lines dividing said overwrap portion into aseries of sections comprising a first side section, a bottom section, asecond side section, top section and a transverse fiap, said first side,bottom, and second side sections adapted to be coextensively folded oversaid front, bottom and rear walls respectively of said open receptacle,said top section adapted to be folded over and form the top wall of saidopen receptacle, said first and second side sections being provided withcontiguous hinged end flaps adapted to be folded over said end walls ofsaid open receptacle, said first side section being provided with atransverse slit, said bottom section being provided with contiguoushinged end flaps having longitudinal slits therein adapted to besuperimposed over said end flaps of said first and second side sections,said top section being provided with contiguous hinged end flaps adaptedto be superimposed over said end flaps of said bottom section, andhaving thereon locking tongues insertable in the longitudinal slits ofthe end flaps of said bottom section, said transverse flap of said topsection adapted to be superimposed over said first side section andhaving thereon a locking tongue insertable in the transverse slit ofsaid first side section.

4. The container as defined in claim 3 wherein said plastic ispolyethylene.

5. A container, particularly adaptable for packaging comestiblescomprising an integral open receptacle and an integral sealable overwrapportion adapted to be folded about said open receptacle, said openreceptacle having as integral parts, a front wall, a bottom wall, a rearwall, and end walls, said overwrap portion being integrally connected tosaid open receptacle along the upper edge of said front wall, and beingprovided with suitable transverse score lines dividing said overwrapportion into a series of sections comprising a first side section, abottom section, a second side section, a top section and a transverseflap, said first side, bottom, and second side sections adapted to becoextensively folded over said front, bottom and rear walls respectivelyof said open receptacle, said top section adapted to be folded over andform the top wall of said open receptacle, said first and second sidesections being provided with contiguous hinged end fiaps adapted to befolded over said end walls of said open receptacle, said first sidesection being provided with a transverse slit, said bottom section beingprovided with contiguous hinged end fiaps having longitudinal slitstherein adapted to be superimposed over said end flaps of said first andsecond side sections, said top section being provided with contiguoushinged end flaps adapted to be superimposed over said end flaps of saidbottom section, and having thereon locking tongues insertable in thelongitudinal slits of the end flaps of said bottom section, saidtransverse fiap of said top section adapted to be superimposed over saidfirst side section and having thereon a locking tongue insertable in thetransverse slit of said first side section, each of said locking tonguesbeing locally sealed in said slits in such a manner that said seal isrupturable by slight force so that an initially closed and sealedcontainer can be opened to provide initial access to the contents, andreclosed to provide protected storage for the partially depletedcontents of the container.

6. A container, particularly adaptable for packaging comestiblescomprising an integral open receptacle and an integral scalable overwrapportion adapted to be folded about said open receptacle, said openreceptacle having as integral parts, a front wall, a bottom wall, a rearwall, and end walls, said overwrap portion being integrally connected tosaid open receptacle along the upper edge of said front wall, and beingprovided with suitable transverse score lines dividing said overwrapportion into a series of sections comprising a first side section, abottom section, a second side section, a top section and a transverseflap, said first side, bottom, and second side sections adapted to becoextensively folded over said front, bottom and rear walls respectivelyof said open receptacle, said top section adapted to be folded over andform the top wall of said open receptacle, said first and second sidesections being provided with contiguous hinged end flaps adapted to befolded over and sealed to said end walls of said open receptacle, saidfirst side section being provided with a transverse slit, said bottomsection being provided with contiguous hinged end flaps havinglongitudinal slits therein adapted to be superimposed over said endflaps of said first and second side sections, said top section beingprovided with contiguous hinged end flaps adapted to be superimposedover said end flaps of said bottom section, and having thereon lockingtongues insertable in the longitudinal slits of the end fiaps of saidbottom section, said transverse flap of said top section adapted to besuperimposed over said first side section and having thereon a lockingtongue insertable in the transverse slit of said first side section,each of said locking tongues being locally sealed in said slits in sucha manner that said seal is rupturable by slight force so that aninitially closed and sealed container can be opened to provide initialaccess to the contents, and reclosed to provide protected storage forthe partially depleted contents of the container.

7. A container, particularly adaptable for packaging comestiblescomprising an integral open receptacle, an overlay portion adapted to bebonded to the upper edges of said open receptacle and an integralscalable overwrap portion adapted to be folded about said openreceptacle, said open receptacle having as integral parts, a front wall,a bottom wall, a rear wall, and end walls, said overwrap portion beingintegrally connected to said open receptacle along the upper edge ofsaid front wall, and being provided with suitable transverse score linesdividing said overwrap portion into a series of sections comprising afirst side section, a bottom section, a second side section, a topsection and a transverse flap, said first side, bottom, and second sidesections adapted to be coextensively folded over said front, bottom andrear Walls respectively of said open receptacle, said top sectionadapted to be folded over and form the top wall of said open receptacle,

said first and second side sections being provided with contiguoushinged end flaps adapted to be folded over said end walls of said openreceptacle, said first side section being provided with a transverseslit, said bottom section being provided with contiguous hinged flapshaving longitudinal slits therein adapted to be superimposed over saidend flaps of said first and second side sections, said top section beingprovided with contiguous hinged end flaps adapted to be superimposedover said end flaps of said bottom section, and having thereon lockingtongues insertable in the longitudinal slits of the end flaps of saidbottom section, said transverse flap of said top section adapted to besuperimposed over said first side section and having thereon a lockingtongue insertable in the transverse slit of said first side section.

8. A plastic container, particularly adaptable for packaging comestiblescomprising an integral open receptacle and an overlay portion adapted tobe bonded to the upper edges of said open receptacle and an integralheat-scalable overwrap portion adapted to be folded about said openreceptacle, said open receptacle having as integral parts a front wall,a bottom wall, a rear wall, and end walls, said overwrap portion beingintegrally connected to said open receptacle along the upper edge ofsaid front wall, and being provided with suitable transverse score linesdividing said overwrap portion into a series of sections comprising afirst side section, a bottom section, a second side section, a topsection and a transverse flap, said first side, bottom and second sidesections adapted to be co extensively folded over said front, bottom andrear walls respectively of said open receptacle, said top sectionadapted to be folded over and form the top wall of said open receptacle,said first and second side sections being provided with contiguoushinged end flaps adapted to be folded over said end walls of said openreceptacle, said first side section being provided with a transverseslit, said bottom section being provided with contiguous hinged endflaps having longitudinal slits therein adapted to be superimposed oversaid end flaps of said first and second side sections, said top sectionbeing provided with contiguous hinged end flaps adapted to besuperimposed over said end flaps of said bottom section, and havingthereon locking tongues insertable in the longitudinal slits of the endfiaps of said bottom section, said transverse fiap of said top sectionadapted to be superimposed over said first side section and havingthereon a locking tongue insertable in the transverse slit of said firstside section, each of said locking tongues being locally heatsealed insaid slits in such a manner that said heat-seal is rupturable by slightforce so that an initially closed and sealed container can be opened toprovide initial access to the contents, and reclosed to provideprotected storage for the partially depleted contents of the container.I

9. A plastic container, particularly adaptable for packagingcornestibles comprising an integral open receptacle and an integralheat-scalable overwrap portion adapted to be folded about said openreceptacle, said open receptacle having as integral parts a front wall,a bottom Wall, a rear wall, and end walls, said overwrap portion beingintegrally connected to said open receptacle along the upper edge ofsaid front wall, and being provided with transverse score lines dividingsaid overwrap portion into a series of sections comprising a first sidesection, a bottom section, a second side section, a top sec tion and atransverse fiap, said first side, bottom, and second side sectionsadapted to be coextensively folded over said front, bottom and rearwalls respectively of said open receptacle, said top section adapted tobe folded over and form the top wall of said open receptacle, said firstand second side sections being provided with contiguous hinged end flapsadapted to be folded over said end walls of said open receptacle, saidfirst side section being provided with a transverse slit, said bottomsection being provided with contiguous hinged end flaps adapted to besuperimposed over said end flaps of said first and second side sections,said top sectionbeing provided with contiguous hinged end fiaps adaptedto be superimposed over and heat-sealed to said end flaps of said bottomsection, said transverse flap of said top section adapted to besuperimposed over said first side section and having thereon a lockingtongue insertable in the transverse slit of said first side section,said locking tongue being locally heat-sealed in said slit.

10. A plastic container particularly adaptable for packaging ccmestiblescomprising an integral open receptacle, an overlay portion adapted to bebonded to the upper edges of said open receptacle and an integralheat-scalable overwrap portion adapted to be folded about said openreceptacle, said open receptacle having as integral parts a .front wall,a bottom Wall, a rear wall, and end Walls, said overwrap portion beingintegrally connected to said open receptacle along the upper edge ofsaid front wall, and being provided with transverse score lines dividingsaid overwrap portion into a series of sections comprising a first sidesection, a bottom section, a second side section, a top section and atransverse section, said first side, bottom and second side sectionsadapted to be coextensively folded over said front, bottom and rearwalls respectively of said open receptacle, said top section adapted tobe folded over and form the top Wall of said a open receptacle, saidfirst and second side sections being provided with contiguous hinged endflaps adapted to be folded over said end walls of said open receptacle,said first side section being provided with a transverse slit, saidbottom section being provided with contiguous hinged end flaps adaptedto be superimposed over said end flaps of said first and second sidesections, said top section'being provided with contiguous hinged endflaps adapted to be superimposed over and heat-sealed to said end flapsof said bottom section, transverse flap of said top section adapted tobe superimposed over said first side section and having thereon alocking tongue insertable in the transverse slit of said first sidesection, said locking tongue being locally heat-sealed in said slit.

11. A plastic container particularly adaptable for packaging comestiblescomprising an integral open receptacle and an integral heat-sealableoverwrap portion adapted to be folded about said open receptacle, saidopen receptacle having as integral parts, a front wall, a bottom wall, arear wall, and end walls, said overwrap portion being integrallyconnected to said open receptacle along the upper edge of said frontWall, and being provided with transverse score lines dividing saidoverwrap portion into a series of sections comprising a first sidesection, a bcttom section, a second side section, a top section and atransverse fiap, said first side, bottom, and second side sectionsadapted to be coextensively folded over said front, bottom and rearWalls respectively of said open receptacle, said top section adapted tobe folded over and form the top wall of said open receptacle, said firstside section being provided with a transverse slit, said second sidesection being provided with contiguous hinged end flaps adapted to befolded over said end walls of said open receptacle, said bottom sectionbeing provided with contiguous hinged end flaps, having longitudinalslits therein, adapted to be superimposed over said end flaps of saidsecond side section, said top section being provided with contiguoushinged end flaps adapted to be superimposed over said end flaps of saidbottom section, and having thereon locking tongues insertable in thelongituidnal slits of the end flaps of said bottom section, saidtransverse flap of sealed top section adapted to be superimposed oversaid first side section and having thereon a locking tongue insertablein the transverse slit of said first side section, said transverse flapbeing provided with contiguous hinged end flaps adapted to be foldedover and inserted between said end walls and the end flaps of saidbottom section, each of said locking tongues being locally heat-sealedin said slits.

References Cited in the file of this patent UNITED STATES PATENTS2,285,991 Lester June 9, 1942 2,646,916 Meller July 28, 1953 3,050,229Netf Aug. 21, 1962 FOREIGN PATENTS 24,546 Great Britain of 1898 527,155Great Britain Oct. 3, 1940 1,174,547 France Nov. 3, 1958

3. A PLASTIC CONTAINER, PARTICULARLY ADAPTED FOR PACKAGING COMESTIBLES COMPRISING AN INTEGRAL OPEN RECEPTACLE AND AN INTERGRAL SEALABLE OVERWRAP PORTION ADAPTED TO BE FOLDED ABOUT SAID OPEN RECEPTACLE, SAID OPEN RECEPTACLE HAVING AS INTEGRAL PARTS, A FRONT WALL, A BOTTOM WALL, A REAR WALL, AND END WALLS, SAID OVERWRAP PORTION BEING INTEGRALLY CONNECTED TO SAID OPEN RECEPTACLE ALONG THE UPPER EDGE OF SAID FRONT WALL, AND BEING PROVIDED WITH SUITABLE TRANSVERSE SCORE LINES DIVIDING SAID OVERWRAP PORTION INTO A SERIES OF SECTIONS COMPRISING A FIRST SIDE SECTION, A BOTTOM SECTION, A SECOND SIDE SECTION, TOP SECTION AND A TRANSVERSE FLAP, SAID FIRST SIDE, BOTTOM, AND SECOND SIDE SECTIONS ADAPTED TO BE COEXTENSIVELY FOLDED OVER SAID FRONT, BOTTOM AND REAR WALLS RESPECTIVELY OF SAID OPEN RECEPTACLE, SAID TOP SECTION ADAPTED TO BE FOLDED OVER AND FORM THE TOP WALL OF SAID OPEN RECEPTACLE, SAID FIRST AND SECOND SIDE SECTIONS BEING PROVIDED WITH CONTIGUOUS HINGED END FLAPS ADAPTED TO BE FOLDED OVER SAID END WALLS OF SAID OPEN RECEPTACLE, SAID FIRST SIDE SECTION BEING PROVIDED WITH A TRANSVERSE SLIT, SAID BOTTOM SECTION BEING PROVIDED WITH CONTIGUOUS HINGED END FLAPS HAVING LONGITUDINAL SLITS THEREIN ADAPTED TO BE SUPERIMPOSED OVER SAID END FLAPS OF SAID FIRST AND SECOND SIDE SECTIONS, SAID TOP SECTION BEING PROVIDED WITH CONTIGUOUS HINGED END FLAPS ADAPTED TO BE SUPERIMPOSED OVER SAID END FLAPS OF SAID BOTTOM SECTION, AND HAVING THEREON LOCKING TONGUES INSERTABLE IN THE LONGITUDINAL SLITS OF THE END FLAPS OF SAID BOTTOM SECTION, SAID TRANSVERSE FLAP OF SAID TOP SECTION ADAPTED TO BE SUPERIMPOSED OVER SAID FIRST SIDE SECTION AND HAVING THEREON A LOCKING TONGUE INSERTABLE IN THE TRANSVERSE SLIT OF SAID FIRST SIDE SECTION. 